UnNetHack

In UnNetHack, uncursed scrolls of magic mapping also reveal secret doors. Additionally, blessed scrolls detect objects on the level like uncursed potions of object detection, similar to their effect in SLASH'EM.

SLASH'EM

In SLASH'EM, reading a blessed scroll of magic mapping will reveal the presence of objects on the level as well, with the same effect as an uncursed potion of object detection.